The price of your weed (no matter if it's the K'est KB or the lowest schwagg) depends 100% on your relationship with your supplier. If you are in good with a good grower, or someone close to a grower, your weed could be cheaper than free.
But more importantly...
Who cares?
Why does it matter what someone else pays for weed, or whether yours is more or less dank for the same price?
It's not about money.
If you don't like weed prices,
Grow your own!